Ventilator noise deadener



11g- 15., 1933- G. E, BRADBURY 12,922,152

VENT ILATOR NOISE DEADENER Filed NOV. 2l, 1951 7%; ifi /4M l I V.; l /4 /2/ L3 /a f Patented Aug. 15, l933- UNITED STATES APATENT OFFICE Application November 21,A 1931 Serial No. 576,501

4 V Claims.

This invention relates to a ventilator and noise deadener, and has as its principal object the provision of a device for permitting fresh air to entera room through a window and at the same time deadening most of the street noises which would otherwise come in through this opening.

Another object is to provide the device with a sound deadening material which may be easily formed to a desirable shape to provide air passages therethrough.

' Aiurther object is to provide a device of unitary character which, when applied to a window frame, does not interfere with the free operation of the Window sash.

These and other objects, aswill hereinafter appear, are accomplished by this invention which is fully described in the following specification and shown in the accompanying drawing in which- Figure 1 is a fragmentary perspective View of a window frame and insulator with the improved sound deadener ventilator in position;

Fig. 2 is a vertical sectionalview of the device taken as indicated by the line 2--2 of Fig. 1;

Fig. 3 is a fragmentary plan view, either top or bottom, ofv one of the corrugated members which support the deadening units;

Fig. 4l is a fragmentary perspective view showing the method by which the deadening units are formed from stock material; and

Figs. 5 and 6 are fragmentary perspective views showing modied forms of deadening unit, two of each of the units being shown together.

Referring to the drawing, Fig. 1 illustrates a window frameA, sash B and sill C. Secured to the frame are metal `wings 10 for supporting a glass ventilator plate or baie 1l which is mounted at an angle in a well known manner and spaced from the sash so that when the sash is raised a short distance the air entering the room will be deected upwardly. Over the open space between the sash and the top of the glass baille is mounted the sound deadening device 12 which comprises a rectangular box or framework 13 of a suitable width, and made in lengths which vary in sizes of six inches to lit windows of different Widths. Longitudinal extensions 14 are slidably mounted in the bottom of the box for completely covering the opening above the wings 10, and at the ends of the box.

The top and bottom of the device are made of sheet metal members 15 and 16, respectively,

mit the passage of air. Between the corrugated members are placed sound deadening units 18 which may be made of mineral wool, asbestos fiber, wood, or straw fiber, and the like, held together by a suitable binder which will not be affected'by moist air. The units may be moulded or may be cut from a dat block or slab of the rnateriaL as is 'shown in Fig. 4, in which case the block is. longitudinally slotted at 19, followed by crosswise slots 29 and 2l to form a beveled projection 22 along each edge or the unit. The block is cut along a line 23, which is central with respect to the grooves 20 and 21, severing a unit from the block.

Several of these units are assembled side by side in the device, as shown in Fig. 2, the slots 19 registering with 'the perforations 17 in the members 15 and 16 to provide unobstructed passages therethrough. The projections 22 of each unit are seated in the grooves of the corrugated members, so that they are prevented from shifting laterally. The units are rather fragile and must necessarily be made short to facilitate handling, several being arranged in lengthwise relation to extend the length of the device. Cross bars 158 overlie their adjacent edges of sections, of which three are shown.

To provide a suicient number of slots 19, the device is made somewhat wider than the opening between the window sash and the bade, and a longitudinal passage 24 is provided beyond the baille edge in order to permit circulation of air through the slots at the front. The bottom of the passage 2d. extending inside the baffle is closed by an adjustable plate 25 adapted to abut the balde.

Iut Will be seen that the entire opening between the sash,'the baffle and the wings 10 is closed by the device and its extensions lll and plate 25, so that all air and sound must travel through the openings 19 which are defined by the slots in the sound deadening material. The slots are preferably arranged in vertical position because all sound entering below the window sash is necessarily traveling at an angle to the vertical, and upon entering the slots `is absorbed vin the sound deadening units.

The units may be variously modied, as suggested in Figs-5 and 6. Referring to Fig. 5, the units 18' are provided with slots 19 having projections 30 interposed between their ends in a manner to prevent sound waves which travel in straight lines from passing uninterruptedly therethrough. Fig. 6 illustrates a further modified form wherein the units 18" are formed on an angle at their center, there being slots 19 extending along one or more of their sides. The shape and size of the passages may be Varried, as desired.

The device is advantageous in that the structural 'parts may be easily made from sheet metal. The sound. deadening material is not only inexpensive, but is easily cut from blocks o r may be moulded, and is so constructed that the fragile deadening units ,are amply protected against any forces to which they are likely to be subjected either in handling, transporting, or use. The sound deadening sections may also be made of horizontal slabs spaced apart and drilled or punched with the holes in alignment or staggered. p

While I have shown and described certain embodiments of my invention for clearness and understanding, they are capable of many more modications without departing from the spirit and scope of my invention. Therefore, I do not wish to be understood as limiting myself to the specific construction except as is contained in the appended claims.

I claim:

l. In a window ventilator having an inwardly extending sheet spaced from the Window sash to permit air to pass therebetween when the sash is ing substantially illed. with sound deadening material, and narrow passageways extending through said material and communicating with the perforations in said walls.

2. In a window ventilator having an inwardly extending sheet spaced from the window sash to provide an air passage therebetween when the sash is raised, a box-like structure open at opposite sides and formed for cooperation with the window sash and sheet to ll the passageway, and blocks of sound deadening material arranged side byside within said structure, the adjacent sides of said blocks being slotted to provide a series of narrow passages between the blocks communicating with the' open sides of the structure.

3. A Ventilating device. of the class described comprising a hollow box-like casing having spaced perforated walls, and sound-deadening material within said casing and lling the spaces between the imperforate portions of said walls to provide Ventilating passages through said sounddeadening material and casing walls.

4. A Ventilating device of the class described comprising a y hollow box-like casing having spaced perforated walls, and blocks of sounddeadening material arranged in adjacent spaced relationship between the walls of said casing pro- GEORGE E. BRADBURY. 

